The models of wood water heaters have a capacity of 80, 115 and 150 liters. The operation can be exclusively to wood, electric-wood or electric-thermo-wood. The inner tank is realized in metal sheets of great thickness with an hot-galvanizing treatment. The enclosure of model 80 liters is glass-porcellanizing and it is resistant to the high temperature generated by the furnace. The tank of 115 and 150 liters is powder painting and oven-heated at 220°.